Centrifugal pump



i upon the y I T 0 all whom it may camera:

, rovements in and Relating to Centrifugal charge.

Patented Deg. l9, EQZZ.

Un t, star images as rarest otter-ca.

i JOHN sran'anr HAZELlL. or ronns'r earn, ioitnon, ENGLAND, Assrenor.'ro

I ononoanaarn r-mar LrMrrEnor LONDON, ENGLAND.

fcnn'rarrnear. PUMP.

Application filed March 16, 1921. Serial No. 452,799.

be it known that 1, JOHN STANLEY HAZ- ELL, a subject of the King ofGreat Britain, residing in Forest Gate, London, England, have vinventedcertain new and useful Imumps, of which the following is'a'specification.

This invention relates to centrifugal pumps in which the impeller isprovided with a single port or passage, through which the liquid isdrawn and; passes to the dis- It, will be obvious underfthesecircumstances that when working there will be discharge side of theimpeller a body of water the weight of which will act to destroy thebalance of said impeller.

The present invention has for its object to provide means designed toovercome balancing of the impeller whereby the strains which wouldotherwise be set up updn the impeller and upon the shaft and bearingthereof are avoided.

According to this invention the impeller is provided with a closedchamber so placed and of such dimensions as to permit it to contain abody of liquid of such weight as to secure the balance-of the impeller.

. llnorderjthat the. invention may be the better understood drawings areappended in which l Fig. 1 is'a vertical section longitudinally of theshaft of a centrifugal pump embodying the present invention,

Fig. 2 is. a section to a larger scale" on line A A Fig, 1.

Referrmgto the accompanying drawings a indicates the pump casingprovided on each side with covers b, b 'one of said covers I I) beingopen for the-entry of the liquid.

The impeller d, to which is secured in any convenient manner the innerend of the spindle c, is provided with a passage or port 3 one end ofwhich communicates with the entry or suction whilst the othercommunicates with the discharge.

lhe body of the im eller is formed hol low as shown, the ho low portionthereof.

being provided with partitions e, c dividpassage or port. By this meansthe strains which would otherwise beset up in the impeller, causingunequal wear of the bearings for the impeller shaft, are avoided.

Claims:

' 1. A. centrifugal pump comprising anoutercase, an inlet to said case,an outlet from said case, an impeller having a single passage, means forensuring the balance of the impeller when in operation, comprising.

.a closed chamber formed in the body of the impeller, an opening forfilling said chamber and a closure for said opening.

2. A centrifugal pump comprising an I outer case, an inlet to said case,an outlet from-said case, an impeller having a single passage, means forensuring the balance of the impeller when in operation comprising aclosed'chamber formed in the body of the impeller, an opening forfilling said chamber and a closure for said opening, the dimensions ofthe chamber being such that it may contain suflicient liquid to securethe balance of the impeller. i

3; A centrifugal pump comprising an outer case having an inlet and anoutlet; and an impeller in said case having a single. passage providedwith means for insuring the balance of the impeller when in operation,said means comprising a closed chamber formed in the impeller and havingan opening for filling said chamber and a closure for said opening.

"In witness whereof I have hereunto set my hand in the presence of twowitnesses.

JOHN STANLEY HAZELL. Witnesses:

PERCY W. Cox, EDMUND H. HASBERD.

